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Date: Thu, 3 Jan 2019 11:40:38 +0000
From: "james qian wang (Arm Technology China)" <james.qian.wang@....com>
To: Liviu Dudau <Liviu.Dudau@....com>,
"daniel.vetter@...ll.ch" <daniel.vetter@...ll.ch>,
"rdunlap@...radead.org" <rdunlap@...radead.org>,
"robh+dt@...nel.org" <robh+dt@...nel.org>
CC: "Jonathan Chai (Arm Technology China)" <Jonathan.Chai@....com>,
Brian Starkey <Brian.Starkey@....com>,
"Julien Yin (Arm Technology China)" <Julien.Yin@....com>,
"thomas Sun (Arm Technology China)" <thomas.Sun@....com>,
Alexandru-Cosmin Gheorghe <Alexandru-Cosmin.Gheorghe@....com>,
"Lowry Li (Arm Technology China)" <Lowry.Li@....com>,
Ayan Halder <Ayan.Halder@....com>,
"Tiannan Zhu (Arm Technology China)" <Tiannan.Zhu@....com>,
"Jin Gao (Arm Technology China)" <Jin.Gao@....com>,
"Yiqi Kang (Arm Technology China)" <Yiqi.Kang@....com>,
nd <nd@....com>, "malidp@...s.arm.com" <malidp@...s.arm.com>,
"maarten.lankhorst@...ux.intel.com"
<maarten.lankhorst@...ux.intel.com>,
"maxime.ripard@...tlin.com" <maxime.ripard@...tlin.com>,
"sean@...rly.run" <sean@...rly.run>,
"corbet@....net" <corbet@....net>,
"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
"mchehab+samsung@...nel.org" <mchehab+samsung@...nel.org>,
"davem@...emloft.net" <davem@...emloft.net>,
"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
"nicolas.ferre@...rochip.com" <nicolas.ferre@...rochip.com>,
"arnd@...db.de" <arnd@...db.de>,
Mark Rutland <Mark.Rutland@....com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
"airlied@...ux.ie" <airlied@...ux.ie>,
"yamada.masahiro@...ionext.com" <yamada.masahiro@...ionext.com>,
"james qian wang (Arm Technology China)" <james.qian.wang@....com>
Subject: [PATCH v4 4/9] drm/komeda: Add DT parsing
From: "james qian wang (Arm Technology China)" <james.qian.wang@....com>
Parse DT and initialize corresponding dev/pipeline attributes.
Changes in v4:
- Rebase.
Changes in v3:
- Fixed style problem found by checkpatch.pl --strict.
Changes in v2:
- Unified abbreviation of "pipeline" to "pipe".
Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@....com>
Acked-by: Liviu Dudau <liviu.dudau@....com>
---
.../gpu/drm/arm/display/komeda/komeda_dev.c | 76 +++++++++++++++++++
.../gpu/drm/arm/display/komeda/komeda_dev.h | 3 +
.../drm/arm/display/komeda/komeda_pipeline.c | 4 +
.../drm/arm/display/komeda/komeda_pipeline.h | 7 ++
4 files changed, 90 insertions(+)
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
index 4dec259cecac..7257248463bc 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
@@ -9,6 +9,76 @@
#include <linux/of_graph.h>
#include "komeda_dev.h"
+static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np)
+{
+ struct komeda_pipeline *pipe;
+ struct clk *clk;
+ u32 pipe_id;
+ int ret = 0;
+
+ ret = of_property_read_u32(np, "reg", &pipe_id);
+ if (ret != 0 || pipe_id >= mdev->n_pipelines)
+ return -EINVAL;
+
+ pipe = mdev->pipelines[pipe_id];
+
+ clk = of_clk_get_by_name(np, "aclk");
+ if (IS_ERR(clk)) {
+ DRM_ERROR("get aclk for pipeline %d failed!\n", pipe_id);
+ return PTR_ERR(clk);
+ }
+ pipe->aclk = clk;
+
+ clk = of_clk_get_by_name(np, "pxclk");
+ if (IS_ERR(clk)) {
+ DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe_id);
+ return PTR_ERR(clk);
+ }
+ pipe->pxlclk = clk;
+
+ /* enum ports */
+ pipe->of_output_dev =
+ of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0);
+ pipe->of_output_port =
+ of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT);
+
+ pipe->of_node = np;
+
+ return 0;
+}
+
+static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct device_node *child, *np = dev->of_node;
+ struct clk *clk;
+ int ret;
+
+ clk = devm_clk_get(dev, "mclk");
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ mdev->mclk = clk;
+ mdev->irq = platform_get_irq(pdev, 0);
+ if (mdev->irq < 0) {
+ DRM_ERROR("could not get IRQ number.\n");
+ return mdev->irq;
+ }
+
+ for_each_available_child_of_node(np, child) {
+ if (of_node_cmp(child->name, "pipeline") == 0) {
+ ret = komeda_parse_pipe_dt(mdev, child);
+ if (ret) {
+ DRM_ERROR("parse pipeline dt error!\n");
+ of_node_put(child);
+ break;
+ }
+ }
+ }
+
+ return ret;
+}
+
struct komeda_dev *komeda_dev_create(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
@@ -71,6 +141,12 @@ struct komeda_dev *komeda_dev_create(struct device *dev)
goto err_cleanup;
}
+ err = komeda_parse_dt(dev, mdev);
+ if (err) {
+ DRM_ERROR("parse device tree failed.\n");
+ goto err_cleanup;
+ }
+
return mdev;
err_cleanup:
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h
index b48d711071be..9c43565fec2a 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h
@@ -72,6 +72,9 @@ struct komeda_dev {
/** @mck: HW main engine clk */
struct clk *mclk;
+ /** @irq: irq number */
+ u32 irq;
+
int n_pipelines;
struct komeda_pipeline *pipelines[KOMEDA_MAX_PIPELINES];
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
index 179122fc93ff..edb1cd7795f9 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
@@ -53,6 +53,10 @@ void komeda_pipeline_destroy(struct komeda_dev *mdev,
clk_put(pipe->pxlclk);
clk_put(pipe->aclk);
+ of_node_put(pipe->of_output_dev);
+ of_node_put(pipe->of_output_port);
+ of_node_put(pipe->of_node);
+
devm_kfree(mdev->dev, pipe);
}
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
index 7daba0e1946b..d2222e46b10b 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
@@ -288,6 +288,13 @@ struct komeda_pipeline {
struct komeda_improc *improc;
struct komeda_timing_ctrlr *ctrlr;
struct komeda_pipeline_funcs *funcs; /* private pipeline functions */
+
+ /** @of_node: pipeline dt node */
+ struct device_node *of_node;
+ /** @of_output_port: pipeline output port */
+ struct device_node *of_output_port;
+ /** @of_output_dev: output connector device node */
+ struct device_node *of_output_dev;
};
/**
--
2.17.1
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